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Majid Maani, Mir Mozaffar Fallahchai, Fatemeh Shariati,
Volume 5, Issue 2 (6-2019)
Abstract

Background: Removal of mineral pollutants from polluted soil is considered to be major environmental concern in the modern era. The present study aimed to investigate the capability of lead uptake and transfer in various organs of Crataegusaronia and Juniperuspolycarposseedlings and determine the effects of lead accumulation on some of the quantitative indices of these plant species.
Methods: Three-year-old saplings were exposed to various concentrations of lead (zero, 200, 300, and 400 ppm) (No3)2 in the sprouting period in a completely random project in triplicate. Afterwards, the lead uptake value was measured in various organs of C. aronia and J. polycarpus (roots, stems, and leaves) using an atomic absorption device.
Results: The analysis of variance indicated that the features of C. aronia and J. polycarpus saplings (e.g., stem length, basal diameter, and root length) were significantly influenced by lead contamination (P < 0.05). Moreover, the saplings of both varieties had high capacity for lead uptake in their roots, stems, and leaves.
Conclusion: According to the results, the seedlings of C. aronia and J. polycarpus could be used as stabilizing varieties for the removal of lead from polluted soil. It is also notable that J. polycarpus is a more effective lead absorbent compared to C. aronia.

Majid Maani, Mir Mozaffar Fallahchai , Fatemeh Shariati ,
Volume 5, Issue 4 (12-2019)
Abstract

Background: Phytoremediation is a method in which plants are used to absorb pollutants. Heavy metals, through competition with nutrients elements, have a significant effect on their distribution in the plant.
Methods: In this study, seedlings were exposed to different concentrations (0.50, 100 and 150 ppm) of cadmium nitrate during a growing period in a completely random design with three replications. Then the value of cadmium uptake was measured by atomic absorption device in different organs of c.aronia and j. polycarpos (root, stem and leaf).
Results: The obtained results of the analysis of variance showed traits such as stem length, basal diameter, and root length were significantly affected by cadmium metal      (P < 0.01).It was also observed that cadmium accumulation in the root and aerial parts of the plant increased with increasing cadmium concentration, and cadmium accumulation in the root tissues was higher in all treatments than aerial parts. In addition, heavy metals reduced the concentration of all nutrientelements in leaves and stems of seedlings.
Conclusion: According to the results, Seedlings of c.aronia and j. polycarpos can be suggested as stabilizing varieties for remediation of Cadmium polluted soils. It is worth to note that j. polycarpos, in comparison with c.aronia, is better absorbent of Cadmium.


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